Poetry Idea Engine from the Scholastic website is just like a game, and helps you write four different types of poems.
At Time Warp Trio, there is a quick and fun poetry game called Wordsplosion.
An interesting short article about poetry for homeschoolers, also gives a few suggestions for books.
Poetry in Homeschool made by Jimmie (on Squidoo)
A great article by Karen Andreola explaining the Charlotte Mason way of enjoying poetry with your children
Past issues of Sparrow Tree Square , an online literary magazine for children, where many poems can be read and enjoyed.
Halfway Down the Stairs, another online magazine for children, also has a list of classic poetry.
and lastly, 30 poets in 30 days, a celebration of children's poetry hosted by Gottabook.
It is not April quite yet, but I am looking forward to it!